Oxygen moves into a cell by diffusion. The concentration of oxygen outside the cell is higher than the concentration of oxygen inside the cell.
State what is meant by diffusion.
Give one substance that moves out of a cell by diffusion.
Diffusion is described as a passive process. State what is meant by a passive process.
41 exam-style questions on Edexcel GCSE Biology 1.4 Transport across cell membranes, covering 1.4.1 Transport into and out of cells and 1.4.2 Percentage gain and loss in osmosis. Each one has a worked solution and a mark scheme showing where the marks go.